Composition of matter to be introduced into the inner tubes of pneumatic tires for rendering the tires puncture-proof.



UNITED STATES PATENT OFFICE.

THOMAS S. CAUSEY, OF ARLINGTON, TEXAS, ASSIGNOR 0F ONE-TWELFTH TO WM. DUGAN, OF ARLINGTON, TEXAS.

COMPOSITION OF MATTER TO BE INTRODUCED INTO THE INNER TUBES 0F PNEUMATIC TIRES FOR RENDERING THE TIRES PUNCTURE-PROOE l ,ingredients, combined in substantially the proportions stated, viz: dextrin 1 pound,

ground asbestos (mineral wool) 1 pound, powdered magnesia 1 pound, glycerin 1% ounces, wood alcohol 1} pint, water enough to produce a gallon of thecomposition.

It will, of course, be understood that sufiicient dye stufi' may be added to give the composition any desired color. The ingredients above-specified are to be thoroughly mingled by agitation. The dry materials (asbestos and magnesia and dextrin) will preferably be mixed separately from the liquid ingredients, the latter being added later;

The composition produced by combining the ingredients specified, in substantially the proportions stated, will be of a semifluid nature flowing somewhat like syrup. To prevent tires from leakingand to heal punctures. a few pounds of the composition are introduced into a tire through the valve aperture. 7 being used, the composition will spread over the entire interior surface of the tire, adhering thereto due to its semi-fluid nature.

Specification of Letters Patent.

Application filed December 16. 1912. Serial No. 736,985.

When the tire is subsequently Patented May 20, 1913.

A surplus of the composition will tend to maintain a position adjacent to the ground during the rotation of the Wheel upon which the tire is mounted, and as soon as a punc- Lure occurs, the air in attempting to escape, forces the material into the puncture, the escape of air thus being blocked. The air within the tire will, of course, be under sufficient compression to prevent the composition from returning into the tire, and unless the puncture is an unusual size, the composi tion will not be forced entirely through the puncture because its nature is only partially fluid.

What I claim is:

1. The herein described composition of matter, consisting of dextrin, ground asbestos, -magnesia, gycerin, wood alcohol and water, substantial y as described and for the purpose specified.

2. The herein described matter for tires, consisting of dextrin, one pound; ground asbestos, one pound; magnesia, one pound; glycerin, one and one-half ounces; wood alcohol, one-half pint; and enough water to produce a gallon of the composition.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

THOMAS S. CAUSEY.

I composition ofpreventing leaks in pneumatic 

